(loosely) A contradiction in terms. Historically, an oxymoron was a paradox with a point, where the contradiction seems absurd at first glance, and yet is deliberate, its purpose being to underscore a point or to draw attention to a concealed point.
By far the most massive planet in our solar system, Jupiter features giant hurricanes, auroras, abstract artistic cloudswirls, and maybe even a solid core. It also protects Earth by gravitationally clearing the solar system of asteroids and comets.
They give strength, protection, and power, for better or for worse, depending on whether there are benefic or malefic planets located there. If a chart has natural benefic planets in the Angular houses, like Jupiter or Venus, then it will give overall protection to the chart.